
Ext.define('Exxact.utils.MD5', {

    statics: {
        encode: function(s, raw, hexcase, chrsz) {
            raw = raw || false;
            hexcase = hexcase || false;
            chrsz = chrsz || 8;

            // <editor-fold defaultstate="collapsed" desc="safe_add(x, y)">
            function safe_add(x, y) {
                var lsw = (x & 0xFFFF) + (y & 0xFFFF);
                var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
                return (msw << 16) | (lsw & 0xFFFF);
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="bit_rol(num, cnt)">
            function bit_rol(num, cnt) {
                return (num << cnt) | (num >>> (32 - cnt));
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="md5_cmn(q, a, b, x, s, t)">
            function md5_cmn(q, a, b, x, s, t) {
                return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="md5_ff(a, b, c, d, x, s, t)">
            function md5_ff(a, b, c, d, x, s, t) {
                return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="md5_gg(a, b, c, d, x, s, t)">
            function md5_gg(a, b, c, d, x, s, t) {
                return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="md5_hh(a, b, c, d, x, s, t)">
            function md5_hh(a, b, c, d, x, s, t) {
                return md5_cmn(b ^ c ^ d, a, b, x, s, t);
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="md5_ii(a, b, c, d, x, s, t)">
            function md5_ii(a, b, c, d, x, s, t) {
                return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="core_md5(x, len)">
            function core_md5(x, len) {
                x[len >> 5] |= 0x80 << ((len) % 32);
                x[(((len + 64) >>> 9) << 4) + 14] = len;
                var a = 1732584193;
                var b = -271733879;
                var c = -1732584194;
                var d = 271733878;
                for (var i = 0; i < x.length; i += 16) {
                    var olda = a;
                    var oldb = b;
                    var oldc = c;
                    var oldd = d;
                    a = md5_ff(a, b, c, d, x[i + 0], 7,   -680876936);
                    d = md5_ff(d, a, b, c, x[i + 1], 12,  -389564586);
                    c = md5_ff(c, d, a, b, x[i + 2], 17,  606105819);
                    b = md5_ff(b, c, d, a, x[i + 3], 22,  -1044525330);
                    a = md5_ff(a, b, c, d, x[i + 4], 7,   -176418897);
                    d = md5_ff(d, a, b, c, x[i + 5], 12,  1200080426);
                    c = md5_ff(c, d, a, b, x[i + 6], 17,  -1473231341);
                    b = md5_ff(b, c, d, a, x[i + 7], 22,  -45705983);
                    a = md5_ff(a, b, c, d, x[i + 8], 7,   1770035416);
                    d = md5_ff(d, a, b, c, x[i + 9], 12,  -1958414417);
                    c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
                    b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
                    a = md5_ff(a, b, c, d, x[i + 12], 7,  1804603682);
                    d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
                    c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
                    b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
                    a = md5_gg(a, b, c, d, x[i + 1], 5,   -165796510);
                    d = md5_gg(d, a, b, c, x[i + 6], 9,   -1069501632);
                    c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
                    b = md5_gg(b, c, d, a, x[i + 0], 20,  -373897302);
                    a = md5_gg(a, b, c, d, x[i + 5], 5,   -701558691);
                    d = md5_gg(d, a, b, c, x[i + 10], 9,  38016083);
                    c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
                    b = md5_gg(b, c, d, a, x[i + 4], 20,  -405537848);
                    a = md5_gg(a, b, c, d, x[i + 9], 5,   568446438);
                    d = md5_gg(d, a, b, c, x[i + 14], 9,  -1019803690);
                    c = md5_gg(c, d, a, b, x[i + 3], 14,  -187363961);
                    b = md5_gg(b, c, d, a, x[i + 8], 20,  1163531501);
                    a = md5_gg(a, b, c, d, x[i + 13], 5,  -1444681467);
                    d = md5_gg(d, a, b, c, x[i + 2], 9,   -51403784);
                    c = md5_gg(c, d, a, b, x[i + 7], 14,  1735328473);
                    b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
                    a = md5_hh(a, b, c, d, x[i + 5], 4,   -378558);
                    d = md5_hh(d, a, b, c, x[i + 8], 11,  -2022574463);
                    c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
                    b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
                    a = md5_hh(a, b, c, d, x[i + 1], 4,   -1530992060);
                    d = md5_hh(d, a, b, c, x[i + 4], 11,  1272893353);
                    c = md5_hh(c, d, a, b, x[i + 7], 16,  -155497632);
                    b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
                    a = md5_hh(a, b, c, d, x[i + 13], 4,  681279174);
                    d = md5_hh(d, a, b, c, x[i + 0], 11,  -358537222);
                    c = md5_hh(c, d, a, b, x[i + 3], 16,  -722521979);
                    b = md5_hh(b, c, d, a, x[i + 6], 23,  76029189);
                    a = md5_hh(a, b, c, d, x[i + 9], 4,   -640364487);
                    d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
                    c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
                    b = md5_hh(b, c, d, a, x[i + 2], 23,  -995338651);
                    a = md5_ii(a, b, c, d, x[i + 0], 6,   -198630844);
                    d = md5_ii(d, a, b, c, x[i + 7], 10,  1126891415);
                    c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
                    b = md5_ii(b, c, d, a, x[i + 5], 21,  -57434055);
                    a = md5_ii(a, b, c, d, x[i + 12], 6,  1700485571);
                    d = md5_ii(d, a, b, c, x[i + 3], 10,  -1894986606);
                    c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
                    b = md5_ii(b, c, d, a, x[i + 1], 21,  -2054922799);
                    a = md5_ii(a, b, c, d, x[i + 8], 6,   1873313359);
                    d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
                    c = md5_ii(c, d, a, b, x[i + 6], 15,  -1560198380);
                    b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
                    a = md5_ii(a, b, c, d, x[i + 4], 6,   -145523070);
                    d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
                    c = md5_ii(c, d, a, b, x[i + 2], 15,  718787259);
                    b = md5_ii(b, c, d, a, x[i + 9], 21,  -343485551);
                    a = safe_add(a, olda);
                    b = safe_add(b, oldb);
                    c = safe_add(c, oldc);
                    d = safe_add(d, oldd);
                }
                return [a, b, c, d];
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="str2binl(str)">
            function str2binl(str) {
                var bin = [];
                var mask = (1 << chrsz) - 1;
                for(var i = 0; i < str.length * chrsz; i += chrsz) {
                    bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (i % 32);
                }
                return bin;
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="binl2str(bin)">
            function binl2str(bin) {
                var str = "";
                var mask = (1 << chrsz) - 1;
                for(var i = 0; i < bin.length * 32; i += chrsz) {
                    str += String.fromCharCode((bin[i >> 5] >>> (i % 32)) & mask);
                }
                return str;
            }
            // </editor-fold>
            // <editor-fold defaultstate="collapsed" desc="binl2hex(binarray)">
            function binl2hex(binarray) {
                var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
                var str = "";
                for(var i = 0; i < binarray.length * 4; i++) {
                    str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF) + hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF);
                }
                return str;
            }
            return (raw ? binl2str(core_md5(str2binl(s), s.length * chrsz)) : binl2hex(core_md5(str2binl(s), s.length * chrsz)));
            // </editor-fold>
        }
    }
});
